<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cart in cartList" :key="cart.id">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked"
              @change="
                updateCartIsChecked({
                  // 注意：必须是skuId不是id
                  skuId: cart.skuId,
                  // 1 - 0 = 1 (0 -> 1)
                  // 1 - 1 = 0 (1 -> 0)
                  isChecked: 1 - cart.isChecked,
                })
              "
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">
              {{ cart.skuName }}
            </div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <!-- <InputNumber v-model="cart.skuNum" /> -->
            <!-- <InputNumber
              :value="cart.skuNum"
              @input="
                updateCartSkuNum({
                  skuId: cart.skuId,
                  // 比如当前值是2，我点击+，需要变成3
                  // 那么对于服务器来说是数量+1，而不是+3，所以需要$event - cart.skuNum
                  skuNum: $event - cart.skuNum,
                })
              "
            /> -->
            <InputNumber
              :value="cart.skuNum"
              @input="updateSkuNum(cart.skuId, $event - cart.skuNum)"
            />
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuPrice * cart.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a class="sindelet" @click="delCart(cart.skuId)">删除</a>
            <br />
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          :checked="isAllChecked"
          @change="updateAllCartIsChecked(1 - isAllChecked)"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="delAllCart">删除选中的商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择
          <span>{{ isCheckedNum }}</span>
          件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" @click="toTrade">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState, mapActions, mapGetters } from "vuex";
import debounce from "lodash/debounce";
import InputNumber from "@/components/InputNumber";

export default {
  name: "ShopCart",
  components: {
    InputNumber,
  },
  mounted() {
    // 触发getCartList action函数
    this.getCartList();
  },
  computed: {
    // state和getters映射到computed中
    ...mapState("shopcart", ["cartList"]),
    ...mapGetters("shopcart", ["isAllChecked", "isCheckedNum", "totalPrice"]),
  },
  methods: {
    // action和mutation映射到methods中
    ...mapActions("shopcart", [
      "getCartList",
      "updateCartIsChecked",
      "updateAllCartIsChecked",
      "delCart",
      "delAllCart",
      "updateCartSkuNum",
    ]),
    updateSkuNum: debounce(function (skuId, skuNum) {
      this.updateCartSkuNum({
        skuId,
        skuNum,
      });
    }, 200),
    toTrade() {
      if (this.isCheckedNum === 0) {
        // 没有选中任何商品
        this.$message.warning("请选中至少一个商品");
        return;
      }

      this.$router.push("/trade");
    },
  },
};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;
  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }
  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;
      & > div {
        float: left;
      }
      .cart-th1 {
        width: 25%;
        input {
          vertical-align: middle;
        }
        span {
          vertical-align: middle;
        }
      }
      .cart-th2 {
        width: 25%;
      }
      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }
    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;
      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;
        & > li {
          float: left;
        }
        .cart-list-con1 {
          width: 15%;
        }
        .cart-list-con2 {
          width: 35%;
          img {
            width: 82px;
            height: 82px;
            float: left;
          }
          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }
        .cart-list-con4 {
          width: 10%;
        }
        .cart-list-con5 {
          width: 17%;
          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
            text-decoration: none;
          }
          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 31px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
            text-decoration: none;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }
  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;
        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
          text-decoration: none;
          &hover {
            color: white !important;
          }
        }
      }
    }
  }
}
</style>
